CN102088120B - Lithium power battery clustering system and management method thereof - Google Patents
Lithium power battery clustering system and management method thereof Download PDFInfo
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- CN102088120B CN102088120B CN2010106139927A CN201010613992A CN102088120B CN 102088120 B CN102088120 B CN 102088120B CN 2010106139927 A CN2010106139927 A CN 2010106139927A CN 201010613992 A CN201010613992 A CN 201010613992A CN 102088120 B CN102088120 B CN 102088120B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a lithium power battery clustering system and a management method thereof, which can be used for the discharging and charging control of a power lithium battery pack. The system comprises a central controller and plural parallel lithium battery modules, wherein each lithium battery module comprises plural serial monomer lithium batteries; each monomer lithium battery is configured with a relay which causes the monomer lithium battery to be accessed into a serial loop; and the input control end of each relay is connected with a module processor. Each monomer lithium battery is accessed into the circuit at the most proper time according to state data collected by the module processor and the order of the central controller; and the discharging process for the lithium battery to output outwards and the charging process for adsorbing external circuit energy can be realized by a bidirectional current path so as to obtain the optimal working state of the monomer battery and prolong the service life of the battery to be almost as long as that of the monomer battery.
Description
Technical field
The present invention relates to a kind of lithium dynamical battery group system and management method thereof.
Background technology
Lithium battery is with respect to conventional batteries, has content volume than big, and cycle charge-discharge solid-stately need not be considered advantage such as placement direction often, and it is first-selected progressively to become the battery that needs in the forceful electric power dynamical system at present.The lithium electricity is because the design feature of himself is difficult to accomplish the big voltage of monomer, big electric current output.That is to say that the lithium battery of single body can't be exported big power, single lithium battery is mainly used in mobile phone, small-sized electric instrument etc. at present.
For giving full play to the advantage of lithium battery, lithium battery must be formed battery pack through parallel connection, series system, to reach required power requirement.In the serial lithium battery course of work, owing to there is individual difference (like internal resistance, output voltage etc.), power output is unbalanced.This lack of uniformity causes the battery operated loss that quality is lower in the series loop big, and under maximum conditions, possibly cause fatal overcharging or overdischarge, has a strong impact on the life-span of lithium battery.
Current; The monomer of lithium battery discharges and recharges and experiment showed, that single lithium battery is meeting (major limitation charging and discharging currents and voltage) under the working condition, discharges and recharges that number of times can reach 3000 times even more; And under the series connection situation, the lithium battery group generally can only be operated in about 500 circulations.The destruction that lack of uniformity caused is the main factor that influences battery life.Conventional method is formed battery pack to improve the life-span of battery pack through the lithium battery of strict apolegamy performance fairly similar.
Summary of the invention
The objective of the invention is to deficiency to prior art; Utilize advanced computer technology; Each single lithium battery in the connection in series-parallel loop is carried out accurately control; Let each lithium battery be operated under the routine work condition of battery, do not make to surmount, thereby increase substantially useful life of battery pack.
The present invention; Described lithium dynamical battery group system comprises a central controller and a plurality of lithium battery module that is connected in parallel, and each lithium battery module comprises the single lithium battery BT of a plurality of series connection; Relay that can make single lithium battery BT insert series loop of each single lithium battery BT configuration; The input control end of each relay is connected with module handler, and as the positive pole output of lithium battery module, the negative pole of the series loop of lithium battery BT is exported as the negative pole of lithium battery module after the positive pole of the series loop of lithium battery BT is connected VMOS pipe Q1 and inductance L successively; Between the negative pole of the tie point of VMOS pipe Q1 and inductance L and lithium battery module; And meet VMOS pipe Q2, and VMOS pipe Q1 is connected with module handler respectively with the grid of VMOS pipe Q2, and module handler is connected with central controller through control bus.Each single lithium battery BT through AD converter, current sensor or/and temperature sensor be connected with module handler.
The present invention, the management method of described lithium dynamical battery group system, at the beginning; Just consider the inhomogeneities of each battery in the battery pack earlier, utilize the battery redundant technique, the battery output total voltage in the series loop is if be higher than specified target voltage; System work process is to insert several perhaps way to manages of all batteries in turn; At any time monitor the operating state of each battery, adjustment at any time is to reach the purpose of balanced output; Thereby make each cell under stable status, the performance that performance is maximum.When the power output that solves series loop was balanced, circuit let each group series battery export electric current, the voltage that accurate compliance with system requires through pulsewidth adjustment mode.Because the intervention of module handler, circuit can easily be adjusted output current, the voltage of each lithium battery module neatly.
The present invention, circuit provides power capacity to reclaim function simultaneously.Under the situation of slowing down, braking at the dynamical system motor, conventional method releases energy through mechanical friction.The mechanical friction mode lets the valuable energy be converted into heat energy and wastes.In electrokinetic cell system, the efficient of energy is the pith in the system design.Energy recuperation efficiently can reduce the use of battery capacity, reduces system bulk, capacity, the stability of strengthening system.In the native system circuit; Through two-way step-up/step-down circuit, according to the demand of control transducer and central processing unit historical data, through advanced person's algorithm; At any time control the battery in the place in circuit, be transmitted back to the designing requirement that specifically needs most the makeup energy battery thereby reach the energy that needs are absorbed.
Generally speaking, circuit of the present invention utilizes computer technology, lets energy in whole system, accurately flow, and makes each battery operated in optimum Working, thereby reaches the requirement of the battery pack bulk life time of connection in series-parallel combination near the cell working life.
Description of drawings
Fig. 1 is the overall structure figure of lithium dynamical battery group system of the present invention;
Fig. 2 is the circuit theory diagrams of each lithium battery module of the present invention.
Embodiment
To combine accompanying drawing to be described in detail the structure and the management principle thereof of lithium dynamical battery group system of the present invention below.
With reference to Fig. 1-Fig. 2; A kind of lithium dynamical battery group system; Comprise a central controller and a plurality of lithium battery module that is connected in parallel; Each lithium battery module comprises the single lithium battery BT of a plurality of series connection, relay that can make single lithium battery BT insert series loop of each single lithium battery BT configuration, and 2,4 of the input control ends of each relay are connected with module handler;, exports at the positive pole of the series loop of lithium battery BT after connecting VMOS pipe Q1 and inductance L successively as the positive pole of lithium battery module; The negative pole of the series loop of lithium battery BT is as the output of the negative pole of lithium battery module, between the negative pole of the tie point of VMOS pipe Q1 and inductance L and lithium battery module, and meets VMOS and manages Q2; VMOS pipe Q1 is connected with module handler respectively with the grid of VMOS pipe Q2, and module handler is connected with central controller through control bus.
Native system is made up of the lithium battery module of arbitrary number, and each module is through control bus and central controller swap data.Each lithium battery module is composed in series through relay by cell, and each single lithium battery all can receive the instruction of central controller at any time, whether determines place in circuit by module controller through drive circuit (relay).Control bus is realized 2 functions:
1, each single lithium battery current electric quantity, voltage, current conditions are transmitted to central controller in each module.
2, central controller is passed on action command to module controls.
With reference to figure 2, each single lithium battery BT through AD converter, current sensor or/and temperature sensor be connected with module handler.After module handler collects the operating state of each single lithium battery, upload data to system's central controller, simultaneously, accept execution command, driving relay and the VMOS plumber work of biography under the central controller through control bus through control bus.When system passes through to calculate, when confirming that certain cell need not participated in work, break off Q1, utilize Q2 to pass through the inductance L afterflow.At this moment, there is not electric current in the channels in series.When 1,3 closures of relay, during 1,5 disconnections, cell (for example BT1) detachment system.When 1,5 closures of relay, during 1,3 disconnections, cell (for example BTn) connecting system.After the battery switching finished, Q1 was open-minded with pulse width modulation mode, and Q2 cooperates the electronics afterflow, to the accurate output voltage of external circuit.
In this handoff procedure, the high speed characteristics that makes full use of relay low-resistance characteristic and VMOS pipe cooperates.Relay is in handoff procedure, because VMOS pipe Q1 cuts off electric current earlier, relay contact spark arc do not occur in the handoff procedure under the situation that no current passes through, and relay can reach maximum service life.The relay conducting resistance is extremely low, and is lossless basically in motor circuit, improves system effectiveness.It is fast that the VMOS pipe has operating rate, and switching loss is low in the handoff procedure, and advantages such as no switching noise are adapted at taking on the effect of adjusting voltage in total output.
In the needs energy recuperation, under the effect of processor, Q2 and inductance L constitute booster circuit; The effect of Q1 transfers electronic rectifier to; Need in system's access after the battery of charging, Q2 is through pulse width control, with the magnitude of voltage of the boost in voltage in the external circuit to match battery.Even slower at the external circuit motor speed, under the lower situation of external circuit voltage, the native system circuit also can be with voltage transitions to the required charging voltage of battery, thereby reaches abundant endergonic purpose.
Under the situation of fault, traditional series circuit can't be protected battery overload phenomenon outside, and battery will be because of former thereby hurts such as heatings.In native system,, will cut off VMOS pipe Q1 automatically, the protection battery if sensor surpasses the battery tolerance range to extrinsic current.
Claims (9)
1. lithium dynamical battery group system; It is characterized in that: comprise a central controller and a plurality of lithium battery module that is connected in parallel; Each lithium battery module comprises the single lithium battery BT of a plurality of series connection, relay that can make single lithium battery BT insert series loop of each single lithium battery BT configuration, and the input control end of each relay is connected with module handler;, exports at the positive pole of the series loop of lithium battery BT after connecting VMOS pipe Q1 and inductance L successively as the positive pole of lithium battery module; The negative pole of the series loop of lithium battery BT is as the output of the negative pole of lithium battery module, between the negative pole of the tie point of VMOS pipe Q1 and inductance L and lithium battery module, and meets VMOS and manages Q2; VMOS pipe Q1 is connected with module handler respectively with the grid of VMOS pipe Q2, and module handler is connected with central controller through control bus.
2. lithium dynamical battery group system according to claim 1 is characterized in that: each single lithium battery BT is connected with module handler with temperature sensor through AD converter, current sensor.
3. the management method of a lithium dynamical battery group system according to claim 1 or claim 2; It is characterized in that: relay in each lithium battery module and VMOS pipe closely cooperate; Through the computing of central controller and module handler, let each single lithium battery obtain independent control.
4. the management method of lithium dynamical battery group system according to claim 3; It is characterized in that: when outwards exporting energy in this system; Utilize VMOS pipe Q1 to cut off after the module total current earlier, relay freely switches the combination of battery again under the no current situation.
5. the management method of lithium dynamical battery group system according to claim 3 is characterized in that: the circuit of said lithium dynamical battery group system adopts bidirectional current control, and system both can export energy to external circuit, also can absorb the energy of external circuit.
6. the management method of lithium dynamical battery group system according to claim 3 is characterized in that: under the effect of central controller and module handler, system adjusts each battery to the output current that is fit to according to the immediate status of battery.
7. the management method of lithium dynamical battery group system according to claim 3 is characterized in that: system can boost to the external circuit weak voltage and be fit to the required voltage of lithium battery group charging.
8. the management method of lithium dynamical battery group system according to claim 3; It is characterized in that: said system can be according to system requirements and current battery status; Select suitable several or all batteries to be linked in the circuit, reach with the maximal efficiency power output and perhaps the most appropriately absorb the external circuit energy.
9. according to the management method of the arbitrary described lithium dynamical battery group system of claim 4-7; It is characterized in that: said system can be according to system requirements and current battery status; Select suitable several or all batteries to be linked in the circuit, reach with the maximal efficiency power output and perhaps the most appropriately absorb the external circuit energy.
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| CN2010106139927A CN102088120B (en) | 2010-12-30 | 2010-12-30 | Lithium power battery clustering system and management method thereof |
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| CN2010106139927A CN102088120B (en) | 2010-12-30 | 2010-12-30 | Lithium power battery clustering system and management method thereof |
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| CN102088120B true CN102088120B (en) | 2012-12-05 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864300A (en) * | 2003-10-03 | 2006-11-15 | 布莱克和戴克公司 | Methods of discharge control for a battery pack of a cordless power tool system, a cordless power tool system and battery pack adapted to provide over-discharge protection and discharge control |
| CN101262140A (en) * | 2008-04-30 | 2008-09-10 | 刘云海 | Serial and parallel switching and charging method and charging device for lithium dynamic battery unit |
| CN101849340A (en) * | 2007-10-16 | 2010-09-29 | Sk能源株式会社 | Battery management system with integration of voltage sensor and charge equalizer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864300A (en) * | 2003-10-03 | 2006-11-15 | 布莱克和戴克公司 | Methods of discharge control for a battery pack of a cordless power tool system, a cordless power tool system and battery pack adapted to provide over-discharge protection and discharge control |
| CN101849340A (en) * | 2007-10-16 | 2010-09-29 | Sk能源株式会社 | Battery management system with integration of voltage sensor and charge equalizer |
| CN101262140A (en) * | 2008-04-30 | 2008-09-10 | 刘云海 | Serial and parallel switching and charging method and charging device for lithium dynamic battery unit |
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